Rabu, 02 Oktober 2013

COMET

Correlation between radius and mass

Planets,
satellites, and comets are a part of our solar system. They have certain
mass, radius and volume. The correlation between radius and mass, we
should make the equation:

m a = r b

The equation above can be made to become :

a log m = b log r

or

b / a = log m / log r

The correlation of radius and mass of the solar system can be looked this table:

Name of

Planets

Radius

( r )

Mass

( m )

log m / log r

Venus

Earth

2.4773

2.6109

14.818181

18.181818

2.971722

3.022233

SUM

AVERAGE

5.993955

2.996977

*) Venus and Earth are planets, which radius and mass of Mercury = 1
Average 2.996977 or 3.00, therefore comparison between square power of
radius with mass is three compared one. To make clear the comparison can
be showed correlation between radius and mass.

Mass ( m )

Radius ( r )

m(1/3)

Venus

Earth

14.818181

18.181818

2.47

2.61

2.45

2.62

From table above can be concluded that the mass equal with the radius power three. Can be wrote:

m = r 3

Formation of Halley’s Comet

Comet Halley has
period time for revolution of sun 76 years. By using a rule above can be
calculated that radius of Halley comet.

Mass of Halley’s comet, m = 2.10 -11 (Earth = 1)

Then radius of Comet Halley ( r )
= m(1/3)

= 2.10 -11(1/3)

= 2.7 . 10 -4 ( Earth = 1 )
= 1.73 kilometers

Therefore Halley comet has solid mass, so it like has larger volume because it coated by ice layer.

Shape of sky objects in the solar system can be looked this table:

Sky objects

Diameter (kilometers)

Shape

Jupiter

Saturn

Uranus

Earth

Mercury

Ceres

Juno

Elektra

Antiope

Phthia

Ida

Eros

Gaspra

143,000

120,000

51,000

12,700

4,900

975

240

108

85

38

60 x 25 x 19

33 x 11 x 11

19 x 12 x 11

Ball

Ball

Ball

Ball

Ball

Ball

Ball

Ball

Ball

Ball

Irregular

Irregular

Irregular

Average of Ida diameter = 30 kilometers, and critical limit shape

= (Phthia diameter + Ida diameter)/2

= (38 + 30)/2

= 34 kms

If critical limit shape, diameter less than 34 kms, then shape of sky objects is irregular.

Therefore radius of comet Halley is 1.73 km, thus the shape is irregular.